Here is some quick info on the muffler. Taken directly from Magnaflow's website:
Material: 100% Stainless Steel - Mirror Finish
Body Shape: 5in.x8in. Oval
Inlet/Outlet Size: 2.25in./3.5in.
Body Length: 14in.
Overall Length: 23.5in.
Core Size: Dual 2in.
Position: Center Inlet/Dual Tip Outlet
This is the same muffler used in this custom setup: